The ------- layer decides the location of synchronization points. presentation t
ID: 3912449 • Letter: T
Question
The ------- layer decides the location of synchronization points.
presentation
transport
application
session
We need to upgrade a channel to a higher bandwidth. How is the rate improved if we double the bandwidth?
data rate is quadrupled
None of the above
data rate is doubled
data rate remains the same
---------- routers
1. block spam and monitor networks to keep the free from attacks
2. Routers keep lists that need frequent updates of sites used to launch attacks.
3. They can shut off residential customers who unknowingly download a worm and can send the customers to an Internet site that explains what has occurred and how to fix their computer so that it does not infect the carrier’s network.
switches
layer 2 switches
core routers
edge routers
Suppose a computer sends a packet at the network layer to another computer somewhere in the internet. The logical destination address of the packet is corrupted. What happens to the packet?
None of the above
Packet accepted
All of the above
Packet discarded
presentation
transport
application
session
We need to upgrade a channel to a higher bandwidth. How is the rate improved if we double the bandwidth?
data rate is quadrupled
None of the above
data rate is doubled
data rate remains the same
---------- routers
1. block spam and monitor networks to keep the free from attacks
2. Routers keep lists that need frequent updates of sites used to launch attacks.
3. They can shut off residential customers who unknowingly download a worm and can send the customers to an Internet site that explains what has occurred and how to fix their computer so that it does not infect the carrier’s network.
switches
layer 2 switches
core routers
edge routers
Suppose a computer sends a packet at the network layer to another computer somewhere in the internet. The logical destination address of the packet is corrupted. What happens to the packet?
None of the above
Packet accepted
All of the above
Packet discarded
Explanation / Answer
1) Session layer decides the location of the synchronization points.
2)
Data rate is doubled
C2=2*BW1* log??( ?? + ?????? )
The data rate is doubled (C2 =2*C1)
3)
core routers
edge routers sit at the edge of a backbone network and connect to core routers so core routers is the main router who do the role
4)
Packet discarded
Before using the destination address in an intermediate or the destination node, the packet goes through error checking that may help the node find the corruption (with a high probability) and discard the packet. Normally the upper layer protocol will inform the source to resend the packet.
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